首先,我们需要让用户输入两个字符串,代表要进行乘除运算的数字。 importjava.util.Scanner;publicclassStringMultiplicationDivision{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入第一个数字(字符串形式):");Stringnum1=scanner.nextLine();// 获取第一个输入的字...
在AC之后官方给出了解锁的Solution: To deal with overflow, inspect the current number before multiplication. If the current number is greater than 214748364, we know it is going to overflow. On the other hand, if the current number is equal to 214748364, we know that it will overflow only w...
其中排名第一的答案引用了《Effective Java》中的一段话，这里也引用一下：The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less ...
其中排名第一的答案引用了《Effective Java》中的一段话,这里也引用一下: The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less ...
#How do you create a BigDecimal in Java? Objects can be created using the constructor withstringordoubleparameters. an example: // constructor with String parameterBigDecimalbigDecimal=newBigDecimal("147.87932");System.out.println(bigDecimal);// constructor with Double parameterBigDecimalbigDecimal1=newBi...
此为hashCode计算方法:s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1],为什么用31作为乘数,可以去查看Why does Java's hashCode() in String use 31 as a multiplier?其解释如下 The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed,...
The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is traditional. A nice property of 31 is that the mu...
位运算必然超过乘法运算。Stack Overflow 上关于这个问题的讨论,其中排名第一的答案引用了《EffectiveJava》中的一段话,这里也引用一下: The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalen...
The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is traditional. A nice property of 31 is that the mu...
The value 31 was chosen because it is an odd prime. If it were even and the multiplication overflowed, information would be lost, as multiplication by 2 is equivalent to shifting. The advantage of using a prime is less clear, but it is traditional. A nice property of 31 is that the mu...